產品說明0
資料鏈接:http://pan.baidu.com/s/1i3qqN9F
國內使用的朋友,需要5V供電電腦USB口的請聯繫客服。
Before you use the RS232 level interface,please connect the four pins as the shown below.
You can connect the sim900 moule with the PC using a USB—RS232moudule as shown below.
You can connect the sim900 module with the PC using a USB—TTL moudule as shown below.
Plese notice that the power supply voltage should be 3.7-4.2V and it can provide 2A or more